| 摘要 |
<p>In an oxide superconductor having a composition and the crystal structure of YBa2Cu3O7- delta , barium is partially substituted by potassium, the potassium atoms supplying conduction electrons. The oxide superconductor is produced by mixing and sintering the constituent oxides in their required proportions, but the step of annealing to increase oxygen content may be omitted.</p> |
